U. S. NATIONAL MUSEUM BULLETIN 212 



Order Monocheta 



Suborder Stemmiuloidea 

 Order Coelocheta 



Suborder Lysiopetaloidea 



Suborder Striarioidea 



Suborder Chordeumatoidea 

 Order Merocheta 



Suborder Polydesmoidea 

 Order Zygocheta 



Suborder Juloidea 

 Order Diplocheta 



Suborder Cambaloidea 



Suborder Spirostreptoidea 

 Order Anocheta 



Suborder Spiroboloidea 



In 1897 Silvestri, in a paper entitled "Systema Diplopodum," gave an out- 

 line of a system in which he recognized, under the Chilognatha, the super- 

 orders Opisthandria and Proterandria proposed by Verhoeff" in 1894. Under 

 the Proterandria he set up as new an order Olognatha, under which he recog- 

 nized Cook's orders as suborders, thus: 



Order Olognatha 

 Suborder Monocheta 



Tribe Stemmatiuloidea 



Tribe Xyloiuloidea 

 Suborder Coelocheta 



Tribe Lysiopetaloidea 



Tribe Striarioidea 



Tribe Chordeumoidea 

 Suborder Merocheta 



Tribe Polydesmoidea 



Tribe Spirostreptoidea 

 Suborder Anocheta 



Tribe Spiroboloidea 



Among European workers on the Diplopoda since the beginning of the 

 present century, Attems, Brolemann, Silvestri, and Verhoeff have been most 

 active in extending the knowledge of the group. Of these investigators, 

 Verhoeff has been particularly active in proposing new divisions and names 

 too numerous to be discussed here in detail; the major divisions and terms 

 of the system at which he lately arrived (1926, in Bronn, "Die Klassen und 

 Ordnungen des Tier-Reichs . . . ," Band 5) are as follows: 



Subclass Pselaphognatha 



Order Schizocephala 

 Subclass Chilognatha 

 Superorder Opisthandria 



Order Limacomorpha 



Order Armadillomorpha * 



' Armadillomorpha was proposed as a substitute for Oniscomorpha, which Verhoefif 

 felt was unsuitable in its implication of a resemblance of the diplopods to oniscoid 

 isopods. Apparently he felt no misgivings in preferring to compare them to the mam- 

 malian armadillo! 



